just received new wheels from tarty. profile has skipped like 5 times in its first 40 mins of just riding along. it hasnt skipped for the last 20 mins of riding back from town though..... should i be concerned or is it normal................ and also when i took it out of the box and put it down the drive bit with pawls on slide out. i put it back in and seems ok... is this all normal????? thanks in advance. rudi